Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A low chromium electrofusion rebonded magnesia chrome brick

A technology of fused magnesium and recombination, which is applied in the field of refractory materials, can solve the problems of inability to form a slag protective layer and poor reducibility, and achieve the effects of avoiding adverse effects, improving environmental protection, and facilitating production management

Active Publication Date: 2021-10-26
RUITAI MATERIALS TECHNOLOGY CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many non-ferrous industrial kilns have poor environmental reducibility and cannot form a slag protective layer, so they have to use refractory materials such as fused magnesia-chrome bricks containing chromium oxide

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The content of MgO is 65%, Cr 2 o 3 Fused magnesia chrome sand and Cr with a content of 20% 2 o 3 46% chrome concentrate and Al 2 o 3 Fused magnesia-aluminum spinel with a content of about 68% and a MgO content of about 32% is the main raw material, and can be produced as Cr by using the following ratio 2 o 3 Low-chrome magnesia-chrome brick with a theoretical content of 7.6%: 5% fused magnesia chrome sand for 5-2mm, 20% fused magnesia aluminum spinel for 5-2mm, 12% fused magnesia chrome sand for 2-1mm, 12% fused magnesia chrome sand for 2-1mm Fused magnesia aluminum spinel 10%, 1-0.088mm fused magnesia chrome sand 5%, 1-0.088mm fused magnesia aluminum spinel 5%, 1-0.088mm chrome concentrate 7%, 3 =3.29, apparent porosity=14.1%, and soft T 0.6 ≥1700°C, thermal shock stability 1100°C water cooling ≥4 times, the product has high temperature resistance and thermal shock resistance that meet the requirements.

Embodiment 2

[0031] The content of MgO is 65%, Cr 2 o 3 Fused magnesia chrome sand and Cr with a content of 20% 2 o 3 46% chrome concentrate and Al 2 o 3 Fused magnesia-aluminum spinel with a content of about 68% and a MgO content of about 32% is the main raw material, and can be produced as Cr by using the following ratio 2 o 3 Low-chrome magnesia-chrome brick with a theoretical content of 12.1%: 5-2mm fused magnesia-chrome sand 17%, 5-2mm fused magnesia-aluminum spinel 15%, 2-1mm fused magnesia-chrome sand 10%, 2-1mm fused magnesia-chrome sand Fused magnesia aluminum spinel 5%, 1-0.088mm fused magnesia chrome sand 8%, 1-0.088mm fused magnesia aluminum spinel 2%, 1-0.088mm chrome concentrate 11%, 3 , Apparent porosity=14.3%, Heruan T 0.6 ≥1700°C, thermal shock stability 1100°C water cooling ≥5 times, the product has high temperature resistance and thermal shock resistance that meet the requirements.

Embodiment 3

[0033] The content of MgO is 65%, Cr 2 o 3 Fused magnesia chrome sand and Cr with a content of 20% 2 o 3 46% chrome concentrate and Al 2 o 3 Fused magnesia-aluminum spinel with a content of about 68% and a MgO content of about 32% is the main raw material, and can be produced as Cr by using the following ratio 2 o 3Low-chrome magnesia-chrome brick with a theoretical content of 9.3%: 5-2mm fused magnesia-chrome sand 10%, 5-2mm fused magnesia-aluminum spinel 15%, 2-1mm fused magnesia-chrome sand 15%, 2-1mm fused Fused magnesia aluminum spinel 6%, 1-0.088mm fused magnesia chrome sand 17%, 1-0.088mm fused magnesia aluminum spinel 4%, 1-0.088mm chrome concentrate 2%, 3 , Apparent porosity=16.4, Heruan T 0.6 ≥1700°C, thermal shock stability 1100°C water cooling ≥5 times, the product has high temperature resistance and thermal shock resistance that meet the requirements.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
porosityaaaaaaaaaa
porosityaaaaaaaaaa
porosityaaaaaaaaaa
Login to View More

Abstract

An electro-fused and rebonded composite spinel refractory brick with low chromium oxide content used in the smelting industry. On the one hand, the fused magnesia-aluminum spinel sand is used to greatly replace the fused magnesia-chrome sand, especially the coarse-grained fused magnesia-chrome sand, which greatly reduces the chromium oxide content while avoiding the corrosion resistance. Negative Effects. On the other hand, fused magnesia-chrome sand or magnesia-aluminum spinel sand of various particle sizes produced by crushing was used as much as possible to facilitate production management. Therefore, without affecting production and service life, the pollution of hexavalent chromium is reduced, and the beneficial effect of improving environmental protection is achieved.

Description

technical field [0001] The invention belongs to the field of refractory materials, and mainly relates to a low-chromium electrofusion rebonded magnesia-chrome brick. Background technique [0002] Magnesia-chrome brick is a refractory material made by adding chromite ore or pre-synthesized magnesia-chrome sand to magnesia. It is widely used in harsh parts of non-ferrous and steel smelting kilns. Sintered magnesia-chrome bricks are divided into four categories: ordinary magnesia-chrome bricks, directly combined magnesia-chrome bricks, semi-recombined magnesia-chrome bricks, and recombined magnesia-chrome bricks. [0003] Ordinary magnesia-chrome bricks are refractory products made of ordinary magnesia and general refractory grade chrome ore as raw materials and fired at high and high temperatures. [0004] Direct bonded magnesia-chrome bricks are refractory products fired at high temperature with high-purity magnesia and chrome concentrate as the main raw materials. During f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/047
CPCC04B35/0476C04B2235/3222C04B2235/3241C04B2235/77C04B2235/96C04B2235/9607
Inventor 王俊涛徐琳琳周严敦
Owner RUITAI MATERIALS TECHNOLOGY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com